Hydrogen gas purifier H2-PURE

Overview
H2-PURE purifiers perform continuous removal of water vapor, oxygen and solid particles from compressed hydrogen streams. Designed for fully automatic operation, the units are suitable for integration with electrolyser hydrogen packages and meet requirements for applications including fuel cells (ISO 14687:2019). Version P uses up to ~2% hydrogen for regeneration; version X uses a closed-loop regeneration with zero hydrogen loss. Optional DeOxo unit reduces O2 to <5 ppm.

Function and Technology
Drying is achieved by adsorption in two pressurized columns filled with adsorbent material. The process cycles through adsorption, heating (regeneration) and cooling phases with column switching after adsorbent saturation. Regeneration is heat-based; when external dry gas or cooling water is available, system components are adapted to minimize gas loss (typically 1–2% when external dry gas is used).
OMEGA AIR hydrogen purifiers use Temperature Swing Adsorption (TSA) technology, exploiting temperature-dependent adsorption characteristics of gas molecules on solid adsorbents. HP-PURE models integrate a catalytic DeOxo tower to lower oxygen content via the DEOXO reaction, converting oxygen and hydrogen to water which is condensed and removed.

Why purification is needed
Impurities in hydrogen (oxygen, moisture, particulates and other gases) can cause:

• reduced fuel cell performance
• corrosion and mechanical damage in equipment
• safety risks during storage and transport

Applications

• Chemical industry — ammonia and fertilizer production
• Petrochemical — sulfur removal, hydrocracking, methanol synthesis
• Food industry — hydrogenation processes (e.g., margarine, butter)
• Welding — atomic hydrogen welding and plasma processes
• Glass production — antioxidant or shielding gas (with N2)
• Electronics — semiconductor, LED and display manufacturing
• Aerospace — rocket engine feedstock (liquid hydrogen)
• Building systems — heating and lighting applications
• Hydrogen refuelling stations (HRS) for FCEVs

Required data to prepare quotation

• Inlet pressure
• Inlet flow rate
• Inlet temperature
• Inlet water content
• Required outlet Pressure Dew Point (PDP)
• Inlet O2 concentration
• Requested O2 outlet concentration
• Availability of external dry gas for regeneration/cooling (if yes: temperature and dew point)
• Availability of cooling water for regeneration (if yes: water temperature)

Table - Characteristics of H2-PURE Units
MODEL | Capacity (m3/h) | Capacity (kg/h) | Electrolyser (MW)
H2-PURE 15 | 52.5 | 4.3 | 0.25
H2-PURE 30 | 105 | 8.7 | 0.5
H2-PURE 60 | 210 | 17.4 | 1
H2-PURE 180 | 630 | 52.3 | 3
H2-PURE 300 | 1,050 | 86.8 | 5
H2-PURE 600 | 2,100 | 173.7 | 10
H2-PURE 1200 | 4,200 | 347.3 | 20
H2-PURE 2500 | 8,400 | 694.7 | 40
H2-PURE 3600 | 12,600 | 1,042.0 | 60
H2-PURE 5000 | 16,800 | 1,389.4 | 80
H2-PURE 6500 | 21,000 | 1,736.7 | 100

Notes on versions
Version P: regeneration using external dry gas may consume up to ~2% hydrogen. Version X: closed-loop regeneration with zero hydrogen consumption during regeneration.

Technical specifications

• Product family / series: H2-PURE
• Technology: Temperature Swing Adsorption (TSA)
• Drying method: Adsorption in two pressure columns with cyclic regeneration (adsorption, heating, cooling)
• Regeneration type: Heat-regenerated (options for external dry gas or water cooling)
• Optional DeOxo unit: catalytic DeOxo tower reducing O2 to <5 ppm
• Available models and nominal capacities: see table above (H2-PURE 15 to H2-PURE 6500)
• Integration: suitable for integration with electrolyser hydrogen packages
• Regeneration gas consumption: version P up to ~2% (depending on configuration); version X closed loop (0% loss)